22
R - 4 2 0 D K
R-420DW
12
RESET
IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily
set "L" level the moment power is applied, at this time the LSI is reset. Thereafter set
at "H" level.
13
INTP0
IN
Connected to VC.
14
INTP1
IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
15
P02
OUT
Terminal not used.
16
P03
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "L" level during microwave
cooking and "H" level while not cooking. In
other cooking modes (variable cooking) the
signal turns to "H" level and "L" level in
repetition according to the power level.
(ON and OFF times for other power level.)
17
P04
OUT
Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
18
P05
OUT
Terminal not used.
19
P110
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to ANI7, P100, P101, P102
and P103 terminal while one of G8 line keys on key matrix is touched.
20
P111
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to ANI6, ANI7, P100,
P101, P102 and P103 terminal while one of G7 line keys on key matrix is touched.
21
P112
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to ANI7, P100, P101, P102
and P103 terminal while one of G6 line keys on key matrix is touched.
22
P113
OUT
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to ANI7, P100, P101, P102
and P103 terminal while one of G5 line keys on key matrix is touched.
Pin No.
Signal
I/O
Description
16.7 msec.
H : GND
L : -5V
P-HI
P-70
H : GND
L : -5V
H : GND
L : -5V
ON
ON
OFF
OFF
24 sec.
8 sec.
OFF
16.7 msec.
During cooking
H : GND
L : -5V
